This operating system is eligible for a free upgrade to Windows 10 when available. More details below.

The Start screen. Personalize your Start screen with your favorite news, friends, social networks, and apps. Customizable colors and backgrounds and four different tile sizes make your device as unique as you are.

The apps you want. In addition to great built-in apps for e-mail, people, photos and video editing, you can also download thousands of popular apps from the Windows Store, including Netflix, ESPN, Skype, and Halo: Spartan Assault.

It plays as hard as it works. Windows 8.1 gives you the power to quickly browse, watch movies, play games, polish your resume, and pull together a killer presentation - all on a single PC.

Product Description

Product Description

Use of this OEM System Builder Channel software is subject to the terms of the Microsoft OEM System Builder License. This software is intended for pre-installation on a new personal computer for resale. This OEM System Builder Channel software requires the assembler to provide end user support for the Windows software and cannot be transferred to another computer once it is installed. To acquire Windows software with support provided by Microsoft please see our full package "Retail" product offerings.

Looking for your product key? The product key is a 25-digit string with a hyphen between each 5 digits. It will say "Product Key" before 25 digits or have an image of a key next to 10 digits with the remaining 15 on the next line below. The Product Key is generally located in the lower left corner of the DVD case, on the disc itself, or on a leaflet in the packaging you received.

From the Manufacturer

Windows 8.1 Pro System Builder OEM DVD 64-Bit

Built for Business

With the new Windows, you get the best of work and play. Windows 8.1 Pro includes everything in Windows 8.1, plus enhanced features that help you easily connect to company networks, manage your devices, access one PC from another, encrypt your data, and more.

Get to it all from the new Start screen, even your familiar desktop

Discover popular and unique apps in the Windows Store

Personalize with more tile sizes, colors, & backgrounds

Do more with side by side views of apps and sites

Access photos & files virtually anywhere with SkyDrive built-in

Search, browse, and share more securely and quickly

Protect your data by encrypting it with BitLocker

Access one PC from another with Remote Desktop

Connect to your company network with domain join

What’s new with Windows 8.1 Pro

It Plays as Hard as it Works

Windows 8.1 gives you the power to quickly browse, watch movies, play games, polish your resume, and pull together a killer presentation — all on a single PC. Now you can organize up to three apps on your screen at once in a single view.

The Start Screen

Personalize your Start screen with your favorite news, friends, social networks, and apps. Customizable colors and backgrounds and four different sizes of tiles make your device as unique as you are.

The Apps you Want

In addition to great built-in apps for email, people, photos and video editing – you can also download thousands of popular apps from the Windows Store, including Netflix, ESPN, Skype and Halo: Spartan Assault.

Security

Stay up to date and more secure with Windows Defender, Windows Firewall, and Windows Update.

Speed

Windows 8.1 starts up faster, switches between apps faster, and uses power more efficiently than previous versions of Windows, including Windows 7.

Your Familiar Desktop

From the Start screen, you are just a click away from the familiar Windows desktop you know so you can do the stuff you’ve always done.

Multitasking Made Easy

It’s easy to do more at once. Snap multiple apps side by side in a single view for easy multitasking.

Mouse, Keyboard—and now Touch

Windows 8.1 works harmoniously with various types of devices, including touch, mouse-and-keyboard, or both. Whatever kind of device you have, you'll discover fast and fluid ways to switch between apps, move things around, and go smoothly from one place to another.

Your files, Everywhere

Stay connected to your photos and important files and access them on your phone, tablet or PC with SkyDrive. By signing in with your Microsoft account to any of your PCs running Windows 8.1 and you'll immediately see your own background, display preferences, and settings.